How many times was Romeo and Juliet preformed at the Globe Theatre?

Possibly never. Romeo and Juliet was written about five years before the Globe Theatre was built. Our information about which plays were performed at the Globe is extremely sparse and consists mostly of people who wrote in their diaries "Today I saw a play at the Globe theatre called Cymbeline." Romeo and Juliet is one play for which there are no performance records at the Globe so we cannot be sure it was played there even once.